Monolithic Power Systems Inc. MP86936GRJT-Z

Overview

MP86936GRJT-Z from Monolithic Power Systems is a monolithic half-bridge Intelli-Phase™ power stage integrating high-side and low-side MOSFETs, gate drivers, Accu-Sense™ current sensing, and junction temperature monitoring. It delivers 60A continuous output current with 3V–16V input range, operates up to 3MHz switching frequency, and supports tri-state PWM control for server core voltage regulation.

For engineers reviewing the MP86936GRJT-Z datasheet, MP86936GRJT-Z pinout, MP86936GRJT-Z application, or MP86936GRJT-Z equivalent, key selection criteria include its integrated 60A half-bridge topology, 2ns/6ns dead-time control, ±2% CS gain accuracy, 10mV/°C temperature-sense linearity, and fault-reporting via VTEMP/FLT pin in multi-phase buck converters.

Technical Context

The MP86936 implements a fully monolithic half-bridge architecture with matched HS/LS FETs and adaptive dead-time control (2ns rising / 6ns falling for positive current), enabling high-efficiency operation at up to 3MHz. Its tri-state PWM interface allows seamless integration with multi-phase controllers supporting diode emulation and standby modes.

It features dual-function VTEMP/FLT pin providing real-time junction temperature reporting (150mV offset, 10mV/°C gain) and active fault indication (OC, OTP, SW-PGND short), with latch behavior requiring VIN/VDD recycle for reset. Current sensing uses a bidirectional 8.5μA/A CS output with 0.7V–2.1V valid voltage range and ±2% gain accuracy over temperature.

Key Specifications

Pinout & Package

TQFN-23 (3mm × 6mm) package with exposed thermal pad; MSL Level 1 per JEDEC MO-220 standard; designed for low-inductance, high-current PCB layouts with multiple VIN/PGND vias and tight capacitor placement.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current half-bridge power stage applications.

Compared with TDA21472 and CSD97395Q4M, MP86936GRJT-Z uniquely combines monolithic integration, analog Accu-Sense™ current output, and dual-function VTEMP/FLT in a 3×6mm footprint-enabling simpler, smaller, and more deterministic analog-control VRMs without added ICs or communication overhead.

Availability

MP86936GRJT-Z is available at Aetrix Electronics and suitable for server core voltage regulation, GPU power delivery, AI accelerator modules, and high-density telecom rectifiers requiring stable component supply and long-term production continuity.

Supply support for MP86936GRJT-Z includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs, with over two decades of expertise in DC-DC conversion, motor drivers, and power modules.

The MP86936 belongs to MPS's Intelli-Phase™ family-designed specifically for high-current, high-frequency multiphase buck regulators in datacenter and AI hardware, emphasizing integration, thermal intelligence, and analog control fidelity.

FAQ

What is the recommended input capacitance layout for MP86936GRJT-Z?

Place ≥4× 0805 or 0402 MLCCs (X7R, 10µF–22µF, 25V) directly adjacent to VIN and PGND pins on the same PCB layer. Use ≥8 thermal vias under the exposed pad and VIN/PGND pads to inner-layer power planes. Minimize trace length between capacitors and pins to reduce switching loop inductance below 300pH.

How does the tri-state PWM interface enable diode emulation mode?

When PWM voltage resides within the 1.10V–1.80V (VDD=3.6V) tri-state window for ≥50ns, the HS-FET turns off and LS-FET conducts until zero-current detection occurs. This eliminates reverse recovery losses in light-load conditions, improving efficiency by up to 3% at 5A output.

Can MP86936GRJT-Z operate without an external VDRV supply?

No. VDRV must be supplied externally at 3.0V–3.6V (typical 3.3V) to drive the gate drivers. It powers both high-side bootstrap circuitry and low-side gate buffers. The internal VDD rail derives from VDRV via a 2.2Ω resistor and requires its own 1µF decoupling capacitor to AGND.

What happens to the CS output during standby mode?

In standby mode (SYNC floating/mid-state), the CS circuit is disabled and outputs high-impedance. Upon exit from standby, CS requires 40µs to stabilize before delivering accurate current data. During this wake-up period, controller must ignore CS readings to prevent false OCP triggers.

How is over-temperature protection implemented on the VTEMP/FLT pin?

VTEMP/FLT provides linear analog voltage (10mV/°C, 150mV offset) during normal operation. At junction temperature ≥160°C, it immediately pulls high to VDD (3.0–3.3V) and latches the HS-FET off. The fault persists until VIN and VDD are power-cycled-no software reset is possible.

Is MP86936GRJT-Z compatible with controllers that lack tri-state PWM capability?

Yes-controllers with standard two-state PWM can drive MP86936GRJT-Z by pulling PWM low for off-state and high for on-state. Diode emulation and standby modes are forfeited, but basic buck operation remains functional with fixed dead time and CCM only.

What is the maximum allowable BST capacitor ESR for stable high-side gate drive?

The BST capacitor (0.1µF–0.22µF ceramic) must have ESR <50mΩ to ensure sufficient charge transfer during HS-FET turn-on. Higher ESR causes gate voltage droop, increasing conduction loss and thermal stress. X7R dielectric in 0402 or 0603 case is recommended.